now the cia, pentagon, all has to look at this to determine what they set off and essentially now work backward. if it was a miniaturized bomb, what did it take north korea to get there? where did they get the technology, the engineering, the expertise, the money to do it? they will look at what it would have taken north korea to achieve what they say they achieved and try to figure out how they did it and who might have helped them. zoraida. >> has theyou say there. there has been a lot of skepticism in where this program is right now. >> the u.s. has been skeptical for years. in december, they successfully launched a long-range ballistic missile, now a successful underground nuclear test. so they are achieving some level of expertise in their technology, and engineering. and that is vital if they are getting the help potentially and we don't know from iran, from pakistan. these are key issues. there might be people in those countries helping them, and is north korea then sharing what it knows? it's expertise now, back with countries like iran? >> it raises a lot of questions. >> this